AMERICAN COLEOPTERA. 79 



of the last, longer. Claws slightly dilated at base. Trochanters oF 

 anterior and middle legs moderately long. 



The species known to me are separated in the following manner : 



Joints 2 — 3 — 4 of the antennae very short, equal, together not as long as the 

 fifth which is longer than the sixth. (PI. I, fig. 1 b.) 



Thorax nearly square testaceipennis. 



Joints 2 — 3 — 4 of the antennae short not moniliform, but progressively longer, 

 together nearly equal to the fifth which is longer than the sixth. 

 (PI. I, fig. 1.) 

 Thorax nearly as broad at base as the elytra the sides decidedly diver- 

 gent piceus. 



Joints 2 — 3 — 4 of antennae submoniliform and nearly equal, together nearly 

 equal to the fifth which is not longer than the sixth. (PI. I, fig. 1 c.) 

 Thorax. a little broader at base than apex. Antennae and legs ferrugi- 

 nous rufipes. 



M. testaceipennis Motsch. — Form elongate, black, elytra luteous, suture 

 and margin posteriorly narrowly black, sparsely clothed with short semi-erect 

 yellow hair. Head punctate. Antennae slender, piceous, four-fifths the length 

 of body, joints 2 — 3 — 4 moniliform, together a little longer than half the fifth 

 which is a little longer than the sixth. Thorax nearly square slightly broader 

 at base, disc moderately convex densely punctured and with the oblique im- 

 pressions not evident. Elytra oblong nearly parallel, with rows of moderate 

 punctures which continue to tip but become somewhat finer, intervals trans- 

 versely wrinkled and with a row of fine punctures. Body beneath black, not 

 densely punctate. Legs black. Length .26 inch; 6.5 mm. 



Three specimens are before me which agree entirely in color, the 

 body being black, the elytra reddish-yellow or luteous with the suture 

 and apical margin narrowly black. This color may not be constant 

 but the structure of the antennae will distinguish it from either of 

 the following. 



Occurs in the Mariposa District of California, and is rare. 



M. piceus Lee. — Eesembles the preceding and differs as follows: Color 

 entirely piceous, sparsely clothed with brownish hair. AutenntE with joints 

 2 — 3 — 4 small but not moniliform, progressively longer, together nearly equal 

 to the fifth which is longer than the sixth. Thorax nearly as broad at base as 

 the elytra, narrowed in front, hind angles subacute. Elytra obsoletely striate, 

 striae moderately punctured, intervals punctulate very sparsely. Length .30 

 inch ; 7.5 mm. 



Two specimens from Oregon, two from Montana. One of the former 

 has the humeri pale. 



m, rufipes n. sp. — Oblong, piceous, moderately shining, sparsely clothed 

 with short, semi-erect brownish hair, legs and antennae rufous. Head coarsely 

 punctate. Antennae slender, three-fourths the length of body, joints 2 — 3 — 4 

 submoniliform, together nearly equal to the fifth which is not longer than the 

 sixth. Thorax trapezoidal, a little broader at base than long and narrowed in 

 front, sides nearly straight, disc moderately convex, coarsely and moderately 



